Taliesin Jaffe has an Essential Tremor that makes him shake on Critical Role.

Taliesin Jaffe has a condition that causes him to have mild tremors. He takes medication to help with it, but according to him, also has ADHD and busy life, and often he forgets to take his meds.

Taliesin Jaffe has mentioned that stress affects it, and the last few episodes have been pretty rough on him.

Essential tremor is a progressive, neurological disease characterized by tremor, most often of the hands or arms.

A tremor is an involuntary, rhythmic, movement of a body part. Tremor may be seen as involuntary shaking or trembling of the affected area.